US 7,608,835 B1Granted

Radiation image converting panel

AssigneeHamamatsu Photonics K.K.

InventorsJun Sakurai, Ichinobu Shimizu, Gouji Kamimura

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Abstract

The present invention relates to a radiation image converting panel that effectively prevents deterioration in fluorescence lifetime by a simpler structure. The radiation image converting panel comprises a support body, and a radiation converting film formed on the support body. The radiation converting film is formed on a film forming region which exists within a first main surface of the support body and includes at least a gravity center position of the first main surface. The radiation converting film is doped with Eu, and an Eu concentration distribution has a concentration gradient so as to become higher in the periphery than in the vicinity of the center of the radiation convert film. By thus providing a concentration gradient for the concentration of Eu to be doped, a drop in luminance in the periphery of the radiation converting film can be reduced.

Claims6

Dependent claims

A radiation image converting panel comprising:

a support body having a first main surface and a second main surface opposing said first main surface;
and
an radiation converting film doped with Eu and provided on a film forming region which exists within said first main surface of said support body and includes at least a gravity center position of said first main surface, said radiation converting film being comprised of columnar crystals which are coincident or tilted at a predetermined angle with respect to a normal direction of said first main surface,
wherein, in said film forming region of said first main surface, an Eu concentration of said radiation converting film, located on a peripheral area sandwiched by an edge of said film forming region and a circumference of a reference circle around the gravity center position, is set higher than an Eu concentration of said radiation converting film located on the gravity center position, said reference circle having a radius of 40% or more but 80% or less of a minimum distance from the gravity center position to the edge of said film forming region.

1 more element

Dependencies are inferred from the claim text.